復(fù)雜機(jī)電產(chǎn)品模塊化設(shè)計(jì)若干關(guān)鍵技術(shù)及應(yīng)用研究
[Abstract]:With the improvement of people's living standards, economic globalization and the development of product diversification, customer needs are characterized by diversification and individualization. The requirements of customers in low cost, high quality and individualization have become a severe challenge in the current manufacturing industry. Modular design and manufacture is an important way to meet the challenges above. Based on a reasonable product modularization system, it can be quickly combined into personalized products to meet customer needs. At the same time, the production and management costs can be reduced by mass production and batch management of general modules. This paper is a model of complex electromechanical product module division, modular similarity measurement, modular product configuration design and so on. The key technology of the block design is studied, and the application of the modular design of the wheel loader in a certain enterprise is studied.
(1) the partition method of complex product module based on minimum maximum partition is proposed. Firstly, the definition of minimum and maximum partition is given, and then the preliminary division of complex products is carried out according to the relationship between components and the minimum maximum partition is calculated. In each group, the fuzzy clustering analysis is carried out with the minimum subsets of the subsets, and the module division results of complex products are obtained according to the module degree of polymerization. The method has the advantages of small calculation, optimal threshold and reasonable weight factor. Finally, the modular design of the working device of the wheel loader is taken as an example to illustrate this party. The rationality and validity of the law.
(2) the module division method based on the BOM (product bill of material list) and the optimal modularity degree is studied. First, the product structure tree (PST) is formed based on the BOM of the complex product, and then the correlation matrix (CM) is obtained by analyzing the geometry, function and physical correlation of the components in the same node, and the correlation graph (CG) is generated. The modularization degree (DM) of the combined graph is calculated in different division conditions. The module is determined by selecting the minimum and average value of the optimal modularity in the structure tree. Finally, the rationality and effectiveness of the method is illustrated by the modular design of the working device of the wheel loader.
(3) the requirements of the module division of the wheel loader and the unique principle of module division are studied, and the module division of the wheel loader is divided into 17 first class modules and 77 two level blocks.
(4) the structural similarity and parameter similarity of the electromechanical product module are studied, and the measure method of the similarity of the module structure and the similarity of the parameters and the discriminant method of the uniqueness of the module based on the structure similarity are put forward. The coding method of the module assembly type and the modeling method of the network model are put forward, and the weight of the typical module is set up as an example. The method of similarity measure and matching of assembly relations is given. Based on the similarity and matching of assembly relations, a method of strengthening the matching and similarity measure of the network is proposed, and it is applied to the discrimination of the uniqueness of the module.
(5) the method of parameter similarity measurement and module reusability optimization is studied. A clustering analysis method for module library is proposed to solve the problem of module reuse and redundant instances. First, the definition of module library, module reuse, module instance similarity, redundancy matrix and cluster center are defined. The similarity matrix is constructed by the calculation of the similarity of the module library, and then the module library is analyzed to eliminate the redundant module instance, thus improving the reusability of the module. Finally, the design of the bucket module library of the wheel loader is taken as an example to illustrate the rationality and effectiveness of the method, and to eliminate the redundancy under the premise of meeting the requirements of polymerization. Module 12, improve the reuse rate of module 44.4%.
(6) based on the characteristics of modular products, the multi-layer configuration method of modular products is proposed. First, customer needs are divided into two categories: constrained demand and selective demand. Then, based on customer requirement analysis, the configuration design of modular products is carried out from the core platform and customization module. The modular product is focused on. The core platform design and configuration method, the customization module configuration method, and the wheel loader as an example, the modular product multi-level configuration application validation.
(7) the system design method for modularization of complex mechanical and electrical products is studied, including modularization preparation, modular planning, modular process and module configuration design in four stages. The preparation, modularization, module structure and interface design method of product modularization are discussed, and the modular product innovation design method is discussed, and the method of product innovation design is discussed. Four methods of product innovation based on modularization are analyzed.
(8) the design method of module and module library of mechanical and electrical products is studied, and the design of mechanical and electrical product module is carried out from two aspects of module structure and module interface. The construction of module library of mechanical and electrical products includes model library modeling and module database modeling, and the design process and design method of module and module library are also studied. Taking the product module of wheel loader as an example, the module structure design, module variant design method and module interface design are analyzed.
(9) the modular design platform of mechanical and electrical products facing wheel loader is developed, and the related research results are verified. The engineering background analysis of the modular design of wheel loader, the overall design of the modular design platform of mechanical and electrical products and the related composition design are completed. The platform has the product and its components and modules. The functions of coding management, module management and demand management are implemented. At the same time, the rapid configuration design of wheel loaders is realized based on the multi-level configuration method of wheel loaders.
Through the study of this paper, the key technologies such as module division, module similarity measurement and application and modular product configuration are solved in the modular design of complex mechanical and electrical products. The main achievements are as follows: a module division method suitable for complex electromechanical products is proposed, which has the characteristics of small calculation and more objective and reasonable module division results. The module similarity and its measurement method are applied to module repeatability discrimination and module reusability optimization. The definition of modular product core platform and the multi-layer configuration method of modular products are proposed, which can effectively improve the efficiency of the product configuration, and the success of the research results should be applied to the modular design of wheel loader.
【學(xué)位授予單位】:西安電子科技大學(xué)
【學(xué)位級別】:博士
【學(xué)位授予年份】:2013
【分類號】:TH122
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